adl/oct/seq: Create Component Unit `adl/oct/dbm/coherent_dbm`

[flisboac]

Just like the matrix described in #34, except that coherence is built-in. Follows Miné's description of a half-matrix in his thesis.

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Dependencies

• adl/oct: Create Module Unit adl/oct/st #33
• adl/oct: Create enum-value-related Component Units #31
• adl/oct: Create Component Unit adl/oct/dbm_info #36