Feature&Docs: support the indent control on FmtTable

[kirk0830]

Linked Issue

Fix #6054

Features for developers

1. support the (right) indent control as one of the parameter when instantiating the FmtTable class:

    /**
     * @brief Construct a new Fmt Table object
     * 
     * @param titles titles, its size should be the same as the number of columns
     * @param nrows number of rows
     * @param fmts format strings for each column, its size should be the same as the number of columns
     * @param indent indent for each column, default is 0
     * @param aligns Alignments instance, for alignment of values and titles, e.g. {Align::LEFT, Align::RIGHT} for left alignment of values and right alignment of titles
     * @param frames Frames instance, can be constructed with initializer_list<char> like {'-', '-', '-', ' ', ' '}, for up, middle, down, left and right frames
     * @param delimiters Delimiters instance, can be constructed with initializer_list<char> like {'-', ' '}, for horizontal and vertical delimiters
     */
    FmtTable(const std::vector<std::string>& titles, 
             const size_t nrows, 
             const std::vector<std::string>& fmts,
             const size_t indent = 0,
             const Alignments& aligns = {},
             const Frames& frames = {},
             const Delimiters& delimiters = {})

see unittest of formatter in source/module_base/test/formatter_test.cpp for more details

2. add enough annotation in place where the FmtTable is used, for example:

    const std::vector<std::string> title = {"Total Magnetism (uB)", "", "", ""};
    const std::vector<std::string> fmts = {"%-26s", "%20.10f", "%20.10f", "%20.10f"};
    const std::vector<std::string> orb_names = {"s", "p", "d", "f", "g"};
    FmtTable table(/*titles=*/title, 
                   /*nrows=*/this->ucell->nat, 
                   /*formats=*/fmts, 
                   /*indent=*/0, 
                   /*align=*/{/*value*/FmtTable::Align::RIGHT, /*title*/FmtTable::Align::LEFT});