Document supported pseudocode with section 7 language manuals

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

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+% CPSC-FUNCTION-RIGHT(7)
+
+# NAME
+
+cpsc-function-right - extract the end of a string
+
+# SYNOPSIS
+
+```text
+RIGHT(text : STRING, count : INTEGER) RETURNS STRING
+```
+
+# DESCRIPTION
+
+Return up to count bytes from the end. Use a nonnegative count.
+Counts larger than the string length return the whole string.
+
+# EXAMPLE
+
+```text
+OUTPUT RIGHT("Hello", 2)
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-left(7)](cpsc-function-left.7.md), [cpsc-function-mid(7)](cpsc-function-mid.7.md).
+