feat(L06): add control flow and program counter card

lesson-flow.yaml

@@ -0,0 +1,37 @@
+schema: 1
+card: rv32i-asm/L06
+title: Control Flow — Jumps and Branches
+steps:
+  - id: compare
+    task: task01_branch_compare
+    action: debug
+    profile: hazard3-sim
+    target: hazard3-baremetal
+    command: stemctl debug hazard3-sim rv32i-asm L06 1
+    board:
+      show: [lhs, rhs, funct3, taken, illegal, waveform]
+      highlight: [signed-less-than, unsigned-less-than, equality]
+      question: Dlaczego 0xffffffff jest mniejsze od 1 dla BLT, ale nie dla BLTU?
+    evidence: [six_conditions, signed_unsigned_pair, illegal, trace_vcd]
+  - id: immediate
+    task: task02_control_immediate
+    action: test
+    profile: hazard3-sim
+    target: hazard3-baremetal
+    command: stemctl test hazard3-sim rv32i-asm L06 2
+    board:
+      show: [instruction, format_j, immediate, pc, target]
+      highlight: [implicit-zero-bit, sign-extension, pc-relative-add]
+      question: Dlaczego najmłodszy bit przesunięcia nie jest zapisany w instrukcji?
+    evidence: [branch_plus12, jal_minus8, aligned_targets]
+  - id: pc-sequence
+    task: task03_program_counter
+    action: debug
+    profile: hazard3-sim
+    target: hazard3-baremetal
+    command: stemctl debug hazard3-sim rv32i-asm L06 3
+    board:
+      show: [pc, branch_taken, jump, target, waveform]
+      highlight: [pc-plus-4, branch-target, jump-target]
+      question: Która wartość PC zostanie użyta po skoku do 0x10?
+    evidence: [pc_sequence, branch_count, jump_count, trace_vcd]