Document sequencer requirements and directives (#4373)

* Document sequencer requirements and directives

Added detailed requirements for the sequencer, including support for various directives and operations.

* Reorganize sequencer requirements in documentation

Author: LeStarch

Svc/FpySequencer/docs/sdd.md

@@ -11,7 +11,23 @@ The FpySequencer runs files compiled by `fprime-fpyc` (in the `fprime-gds` packa
 
 ## Requirements
 
-TBD
+| **ID**      | **Requirement**                                                                                                                                   | **Verification**                |
+| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------- |
+| FPY-SEQ-001 | The sequencer shall support branching on conditionals.                                                                                            | Unit Test                       |
+| FPY-SEQ-002 | The sequencer shall support arithmetic and logical operations.                                                                                    | Unit Test                       |
+| FPY-SEQ-003 | The sequencer shall support accessing telemetry.                                                                                                  | Unit Test                       |
+| FPY-SEQ-004 | The sequencer shall support accessing the parameter database.                                                                                     | Unit Test                       |
+| FPY-SEQ-005 | The sequencer shall support calling subroutines with arguments and a single return value.                                                         | Unit Test                       |
+| FPY-SEQ-006 | The sequencer shall support scoped variables.                                                                                                     | Unit Test                       |
+| FPY-SEQ-007 | The sequencer shall support executing commands at relative times.                                                                                 | Unit Test                       | 
+| FPY-SEQ-008 | The sequencer shall support executing commands at absolute times.                                                                                 | Unit Test                       | 
+| FPY-SEQ-009 | The sequencer shall support sequence-local variables.                                                                                             | Unit Test                       |
+| FPY-SEQ-010 | The sequencer shall support executing directives with arguments.                                                                                  | Unit Test                       |
+| FPY-SEQ-011 | The sequencer shall support running sequences with arguments.                                                                                     | Unit Test                       |
+| FPY-SEQ-012 | The sequencer shall read a binary-encoded sequence file of the format described in [TBD]()                                                        | Unit Test                       |
+| FPY-SEQ-013 | The sequencer shall send commands for dispatch.                                                                                                   | Unit Test                       |
+| FPY-SEQ-014 | The sequencer shall support parameterized sequences.                                                                                              | Unit Test                       |
+| FPY-SEQ-015 | The sequencer shall support the directives described in the [Directives](#directives) section.                                                    | Unit Test                       |
 
 ## States