add docs mol_link_source

link/source/demo.view.tree

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+$mol_link_source_demo $mol_example_small
+	title \Link with icon
+	sub /
+		<= Blocks $mol_list
+			rows /
+				<= Input $mol_string
+					value? <=> uri? \https://github.com/hyoo-ru/mam_mol/
+				<= Output $mol_link_source
+					uri <= uri?
+	tags /
+		\link
+		\icon
+		\source
+		\github
+		\url
+	aspects /
+		\Navigation
+		\Widget/Button

link/source/readme.md

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+# $mol_link_source
+
+Hyperlink on source with GitHub icon.
+
+## [Online demo](https://mol.hyoo.ru/#!section=demos/readme/demo=mol_link_source_demo)
+
+## Usage example
+
+```
+<= GitHub $mol_link_source
+	uri \https://github.com/hyoo-ru/mam_mol/
+```
+## Extends: [$mol_link](https://mol.hyoo.ru/#!section=demos/readme/demo=mol_link_demo)
+
+## Properties
+
+**`uri() : string`**
+
+Returns target URI.
+