feat(filenames)!: Add .zsh to filenames to that LSPs can work

BREAKING CHANGE: custom-zshrc is no longer sourced! It needs to have
.zsh appended to make it work again

.gitignore

@@ -1 +1,4 @@
+custom-zshrc.zsh
+
+# Prevent old custom settings file from being tracked
 custom-zshrc

zshrc.zsh

@@ -36,7 +36,7 @@ export DOTNET_CLI_TELEMETRY_OPTOUT=1
 export YSU_MESSAGE_POSITION="after"
 
 # Load aliases and shortcuts if existent.
-[ -f "$HOME/zsh/aliasrc" ] && source "$HOME/zsh/aliasrc"
+[ -f "$HOME/zsh/aliasrc.zsh" ] && source "$HOME/zsh/aliasrc.zsh"
 
 # Initialize `thefuck`
 if command -v thefuck &> /dev/null
@@ -53,7 +53,7 @@ source $HOME/zsh/ssh-connect/ssh-connect.sh 2>/dev/null
 source $HOME/zsh/web-search/web_search.plugin.zsh 2>/dev/null
 source $HOME/zsh/oh-my-zsh-dirhistory/dirhistory.plugin.zsh 2>/dev/null
 source $HOME/zsh/zsh-z/zsh-z.plugin.zsh 2>/dev/null
-source $HOME/zsh/custom-zshrc 2>/dev/null
+source $HOME/zsh/custom-zshrc.zsh 2>/dev/null
 alias mon2cam="deno run --unstable -A -r -q https://raw.githubusercontent.com/ShayBox/Mon2Cam/master/src/mod.ts"
 
 # If on archlinus enable following plugin