Add new index page for HotLabel docs

Author: delphidabbler

HotLabel/index.md

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+# Hot Label Component
+
+This is the home page for the on-line documentation of the DelphiDabbler [Hot Label Component](https://delphidabbler.com/software/hotlabel).
+
+[_TPJHotLabel_](./2/API/TPJHotLabel.md) is a simple Delphi component that descends from _TLabel_. It provides a clickable label that can start the default browser or email client to access a specific URL. 
+
+The unit is:
+
+* Windows only
+* 32 & 64 bit compatible
+* VCL compatible
+* **Not** FireMonkey compatible
+
+## Supported Versions
+
+This documentation applies to Hot Label Component v2.
+
+> v1 is no longer supported and there is no documentation available.
+
+## Contents
+
+* [Overview](./2/Overview.md)
+* [Programmer's Guide](./2/API.md)
+* [Examples](./2/Examples.md)
+
+## Links
+
+* Back to [Documentation Home Page](../index.md)
+* [Hot Label Component Web Page](https://delphidabbler.com/software/hotlabel) -- Install notes, change log, license etc.
+* [Releases](https://github.com/ddablib/hotlabel/releases) -- Download current version here.
+* [Source Code](https://github.com/ddablib/hotlabel) -- Current development tree.