Added a basic TCP server that provides access to an sqlite database. (0.37.58)

examples/sqlited/protocol.md

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+Fun SQL TCP Demo Protocol (TSV, line-based)
+
+- Client sends exactly one line with the SQL text terminated by a newline ("\n"). The server reads up to 64 KiB.
+
+Responses
+
+1) Query returning rows (e.g., SELECT):
+   RESULT
+   col1\tcol2\t...\n
+   v11\tv12\t...\n
+   ...
+   END
+
+   Notes:
+   - First line is the literal word RESULT followed by a newline.
+   - Second line is a header with column names separated by a single tab ("\t").
+   - Each subsequent line is one row; fields are tab-separated. Nil/NULL are encoded as empty strings.
+   - The block terminates with a line containing the literal END.
+
+2) Exec/DDL (e.g., INSERT/UPDATE/CREATE):
+   OK rc
+
+   Notes:
+   - rc is the sqlite3 result code (0 indicates success).
+
+3) Error:
+   ERROR message
+
+   Notes:
+   - The error message is human-readable and not machine-stable.
+
+General
+- Newlines are Unix style ("\n").
+- Tabs and newlines in data are replaced with spaces for TSV safety.
+- The server closes the connection after sending the response.