chore: add README

examples/servers/README.md

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+# Example Servers
+
+| Filename | Works With | Description |
+|-|-|-|
+| `code_actions.py` | `sums.txt` | Evaluate sums via a code action |
+| `code_lens.py` | `sums.txt` | Evaluate sums via a code lens |
+| `colors.py` | `colors.txt` | Provides a visual representation of color values and even a color picker in supported clients |
+| `goto.py` | `code.txt` | Implements the various "Goto X" requests in the specification |
+| `hover.py` | `dates.txt` | Opens a popup showing the date underneath the cursor in multiple formats |
+| `inlay_hints.py` | `sums.txt` | Use inlay hints to show the binary representation of numbers in the file |
+| `publish_diagnostics.py` | `sums.txt` | Use "push-model" diagnostics to highlight missing or incorrect answers |
+| `pull_diagnostics.py` | `sums.txt` | Use "pull-model" diagnostics to highlight missing or incorrect answers |