Move over wiki documentation to repo in Markdown format (#1760)

* Change in-client regex help link to point to the github repository

docs/Commands.md

@@ -0,0 +1,20 @@
+Commands are used as shortcuts for long messages. If a message starts with the "trigger" then the message will be replaced with the Command.
+
+#### Example
+Add Command `Hello chat :)` with the trigger `/hello`. Now typing `/hello` in chat will send `Hello chat :)` instead of `/hello`.
+
+## Advanced
+
+- The trigger has to be matched at the **start** of the message but there is a setting to also match them at the **end**.
+- Triggers don't need to start with `/`
+
+#### Using placeholders
+- `{1}`, `{2}`, `{3}` and so on can be used to insert the 1st, 2nd, 3rd, ... word after the trigger.
+
+  Example: Add Command `/timeout {1} 1` with trigger `/warn`. Now typing `/warn user123` will send `/timeout user123 1`
+
+- Similarly `{1+}` and so on can be used to insert all words starting with the 1st, ... word.
+
+  Example: Add Command `Have a {1+} day!` with trigger `/day`. Now typing `/day very super nice` will send `Have a very super nice day!`
+
+- You can use `{{1}` if you want to send `{1}` literally.

docs/README.md

@@ -1 +1,21 @@
 # Documents
+
+Welcome to the Chatterino2 documentation!
+
+Table of contents:
+  - [Environment variables](ENV.md)
+  - [Commands](Commands.md)
+  - [Regex](Regex.md)
+  - [Notes](notes/README.md)
+    - [TCaccountmanager](notes/TCaccountmanager.md)
+    - [TCappearanceSettings.md](notes/TCappearanceSettings.md)
+    - [TCchannelNavigation.md](notes/TCchannelNavigation.md)
+    - [TCchatterinoFeatures.md](notes/TCchatterinoFeatures.md)
+    - [TCchatting.md](notes/TCchatting.md)
+    - [TCchatWindowNavigation.md](notes/TCchatWindowNavigation.md)
+    - [TCemotes.md](notes/TCemotes.md)
+    - [TCgeneral.md](notes/TCgeneral.md)
+    - [TChighlighting.md](notes/TChighlighting.md)
+    - [TCtabsAndSplits.md](notes/TCtabsAndSplits.md)
+    - [TCusernameTabbing.md](notes/TCusernameTabbing.md)
+

docs/Regex.md

@@ -0,0 +1,45 @@
+_Regular expressions_ (or short _regexes_) are often used to check if a text matches a certain pattern. For example the regex `ab?c` would match `abc` or `ac`, but not `abbc` or `123`. In Chatterino, you can use them to highlight messages (and more) based on complex conditions.
+
+Basic patterns:
+
+|Pattern    |Matches|
+|-|-|
+|`x?`       |nothing or `x`|
+|`x*`       |`x`, repeated any number of times|
+|`x+`       |`x`, repeated any number of times but at least 1|
+|`^`        |The start of the text|
+|`$`        |The end of the text|
+|`x\|y`      |`x` or `y`|
+
+You can group multiple statements with `()`:
+
+|Pattern    |Matches|
+|-|-|
+|`asd?`     |`asd` or `as`|
+|`(asd)?`   |`asd` or nothing|
+|`\(asd\)`  |`(asd)`, literally|
+
+You can also group multiple characters with `[]`:
+
+|Pattern    |Matches|
+|-|-|
+|`[xyz]`    |`x`, `y` or `z`|
+|`[1-5a-f]` |`1`,`2`,`3`,`4`,`5`,`a`,`b`,`c`,`d`,`e`,`f`|
+|`[^abc]`   |Anything, **except** `a`, `b` and `c`|
+|`[\-]`     |`-`, literally (escaped with `\`)|
+|`\[xyz\]`  |`[xyz]`, literally|
+
+Special patterns:
+
+|Pattern    |Matches|
+|-|-|
+|`\d`       |Digit characters (0-9)|
+|`\D`       |Non-digit characters|
+|`\w`       |Word characters (a-zA-Z0-9_)|
+|`\W`       |Non-word characters|
+|`\s`       |Spaces, tabs, etc.|
+|`\S`       |Not spaces, tabs, etc.|
+|`\b`       |Word boundaries (between \w and \W)|
+|`\B`       |Non-word boundaries|
+
+You can try out your regex pattern on websites like [https://regex101.com/](regex101.com).

src/widgets/helper/EditableModelView.cpp

@@ -95,9 +95,10 @@ void EditableModelView::addCustomButton(QWidget *widget)
 
 void EditableModelView::addRegexHelpLink()
 {
-    auto regexHelpLabel =
-        new QLabel("<a href='https://chatterino.com/help/regex'><span "
-                   "style='color:#99f'>regex info</span></a>");
+    auto regexHelpLabel = new QLabel(
+        "<a href='"
+        "https://github.com/Chatterino/chatterino2/blob/master/docs/Regex.md'>"
+        "<span style='color:#99f'>regex info</span></a>");
     regexHelpLabel->setOpenExternalLinks(true);
     this->addCustomButton(regexHelpLabel);
 }